140 VITRINA. 



rarii, Pollonera (figs. 81-83), and V. glacialis, (Forbes?) Pollo- 

 nera (figs. 84-86). A number of succeeding species might also 

 be more usefully regarded as varieties only. V. glacialis, Forbes, 

 has been variously identified ; the short description will not 

 permit a positive recognition. Pfeiffer considered it a syn. of 

 nivalia. I have no hesitation in referring here Pollonera 's figures 

 of glacialis. 



Y. HEYNEMANNI, Koch. PI. 30, figs. 87-90. 



A little longer than the preceding species, with the sides not 

 quite so convex. Piam. 6, alt. 3 mill. 



Germany. 



In form intermediate between V. diaphana and V. elongata. 

 V. lusatica, Jordan (figs. 89, 90), appears to be identical. 



Y. NIVALIS, Charpentier. PI. 30, figs. 91-99. 



Somewhat smaller, with body-whorl somewhat more oblique 

 than V. diaphana, subangulated at the periphery, upper part of 

 outer lip not sinuous, only a little flattened in its curve. 



Diam. 4-75 mill. 



Alps of Switzerland, Savoy and Northern Italy. 



V. Charpentieri, Stabile, and V. alpestris, Clessin, are synonyms. 



Yar. PINIANA, Pollonera. PI. 30, figs. 94-99. 



Slightly less convex above, with less prominent spire, and less 

 oblique body-whorl and aperture than in the type. It forms one 

 of a series of connecting links with V. diaphana. This form 

 corresponds closely with what Pollonera considers the true 

 Charpentieri; which he nevertheless considers a synonym of 

 nivalis. Another step in the connecting series is V. Villee, Pol- 

 lonera (figs. 97-99). 



Y. PYRENAICA, Fe'r. PL 30, figs. 100, 1, 2. 



Shining, hyaline-vitreous ; whorls 2-J, rapidly increasing, the 

 last depressed ; aperture horizontal, almost regularly oval, colu- 

 mella slightly arcuate. Diam. 6, alt. 2'3 mill. 



Near Pic du Midi, Pyrenees. 



Intermediate in form between V. diaphana and V. elongata, and 

 very close to V. Heynemanni. 



